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Set Theory, Logic, Probability, Statistics

- Fundamentals: Set theory, logic and proofs. Probability and statistics
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Jan16-12 Greg Bernhardt
Please post any and all homework or other textbook-style problems in one of the Homework & Coursework Questions...
Feb23-13 09:25 AM
micromass
1 32,446
This might be embarrasingly easy or impossible; I've been a computer programmer for too long since my statistics...
Jul5-11 02:40 AM
rabbyad
3 5,815
Hey, I am trying to find the probability that exactly two people out of m have the same birthday. I know that the...
Jul15-11 02:12 AM
ndrue
15 15,380
Hi everyone, My data consists of road accidents and spatial covariates. Originally i wanted to apply an...
Jul13-11 02:53 AM
adayao
7 2,177
I've been trying to figure out how to do a linear regression on data with asymmetric x and y error bars (different for...
Jul13-11 06:53 AM
pmsrw3
11 5,558
I don't even know how to start this question: I have 6 pairs of socks (12 socks) of different colors. If I...
Jul14-11 07:56 PM
julie9612
4 3,013
In proving :|x|=0\Longrightarrow x=0,the following indirect proof is offered: Let |x|= 0 and suppose x\neq 0...
Jul5-11 04:05 PM
daveb
14 2,042
I'd like to know how to prove (or show that it is reasonable) that the probability that a random vector (X, Y) assumes...
Jul4-11 07:40 PM
ndrue
12 1,866
If all the exams have normal distribution will the average grades to student also be normal distributed? I have...
Jul11-11 08:45 AM
MaxManus
4 1,622
I'm going through the set theory material in the appendix of Knapp's Basic Algebra. I want to make sure that I...
Jul5-11 04:43 PM
TopCat
6 2,477
Let X be a non-empty set, and let S contain all countable subsets of X. Partially order S by inclusion. Let C be a...
Jul11-11 09:19 AM
Josh Swanson
11 4,159
Today my grandfather told me a story, which he insists is true and which I believe he believes is true, which seems to...
Jul8-11 01:37 PM
Megaritz
6 2,208
My goal here is to at least approximately calculate the probability density function (PDF) given the moment generating...
Jul7-11 07:28 PM
bpet
6 6,017
The following problem came up in my work. You have a tube, open at the top. Raindrops fall into the mouth of the...
Jul9-11 08:17 AM
pmsrw3
9 1,947
I have a discrete set of data. I'd like to visualize it probabilistically. Unfortunately, I focused in Num Methods in...
Jul6-11 11:14 AM
pmsrw3
2 1,544
Hi, Why there is a half factor in the definition of the correlation of complex random variables, like: ...
Jul6-11 01:14 PM
S_David
4 2,820
Hi, it will be a very silly question, excuse me plz. I am wondering whether 3/(sqrt(2pi delta^2))...
Jul11-11 08:07 AM
wall_e
4 2,501
Dear all, let's say I want to know the elasticity constant of a spring (k), so I measure several times different...
Jul8-11 01:10 PM
atat1tata
8 2,449
Hi there! I'm trying to prove that every Dedekind cut A has an additive inverse -A such that A + (-A)=0*. We've...
Jul7-11 08:51 AM
micromass
1 1,644
I have 6 years of data which has both a 3-month and a 12-month seasonality, it exhibits a trend and is very noisy. ...
Jul7-11 12:17 AM
Oxymoron
0 710
Hi, everybody Let n_1 ~ Poisson ( \lambda_1 ) and n_2 ~ Poisson (\lambda_2). Now define n=n_1-n_2 . We...
Jul8-11 03:47 AM
sabbagh80
5 1,953
Hello, I have a question regarding the likelihood ratio order of two distributions: Is there a requirement that...
Jul7-11 05:16 PM
hadron23
0 856
Theorem: If "θ hat" is an unbiased estimator for θ AND Var(θ hat)->0 as n->∞, then it is a consistent estimator of θ....
Jul8-11 04:28 PM
kingwinner
4 2,251
Linear Spaces Norms and inner products Holder’s inequality Minkowski’s inequality Normed linear spaces...
Jul8-11 10:00 AM
micromass
1 1,132
suppose i have 2 bayesian networks.... a->b and c->d ie b depends on a and d depends on b now...
Jul10-11 05:41 PM
SW VandeCarr
3 1,204
The ABC manufacturing company purchases a certain part from two suppliers (A supplier & B supplier). The parts...
Jul9-11 12:23 PM
pmsrw3
8 1,575
Olbers' paradox states that if the universe is infinite, static and homogeneous then why is the night sky dark. Of...
Jul9-11 08:35 PM
pmsrw3
3 1,817
Hello y'all, If I have n data points (xi, yi) each with error bars in both x and y (xi_err, yi_err), should I use...
Jul9-11 04:52 PM
pmsrw3
6 2,902
I believe that it is correct, and it concisely represents a concept I have never understood. It seems obvious to me...
Jul9-11 07:40 PM
pmsrw3
3 1,183
In a box with 80 tickets, 10 people buy 10 tickets each. If there are 4 winning tickets drawn at random find the...
Jul10-11 05:40 AM
tiny-tim
1 1,058
Hi there, I am thinking a question of finding the expectation of duplicate numbers (how many time any pair could be...
Jul10-11 07:35 PM
bpet
1 795
Guys, I'm taking real analysis starting with open, close, compact sets, and neighborhoods. Now I'm addict to rely...
Jul11-11 10:58 AM
micromass
2 1,373
Is there a way to calculate/estimate how big a sample from a parent distribution would need to be for the distribution...
Jul11-11 08:33 PM
bpet
2 1,530
Could someone please advise me how to put the integral from + to - infinity notation used $ exp{-1/2(y-x)^2(A^-1) +...
Jul13-11 01:54 PM
EmmaSaunders1
34 3,041
I'm wondering how conditional probability relates to concepts of sample space, observation space, random variable,...
Jul15-11 08:18 AM
Rasalhague
6 1,687
Hi, I will thank If somebody help me solving this problem. Consider a random variable k_1 with the given pmf...
Jul14-11 05:01 AM
sabbagh80
2 1,932
I have a set of data points {xi,yi} where each yi is a Gamma distributed variable where both the shape k and scale...
Jul14-11 11:13 PM
bpet
6 1,162
What is the function that I get when I take a large sample from an exponential distribution (many values from the same...
Jul15-11 08:22 AM
pmsrw3
7 1,227
A random variable is defined as a function from one set, called a sample space, to another, called an observation...
Jul15-11 06:19 PM
micromass
9 1,114
Here, to further test my understanding, is an attempt to apply the measury theory definitions of a probability space...
Jul15-11 07:02 PM
micromass
5 2,637
Given 4 axioms in real Nos: 1) 1x = x ,for all x 2) x+0 = x ,for all x 3) (x+y)z = xz+yz ,for all x,y,z 4)...
Jul16-11 08:04 PM
evagelos
2 895

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